First get in a gunship and fly to the left side of the spire. Take down the spider walker so the ATTE won't lose much health while moving to the Techno Union Ships. If you are a Jet Trooper fly through the hole in the wall of the spire. If you are a different trooper, land then run to the spire. After capturing the spire take either the west or the east bunker. After you take the bunker you are in take the other bunker. The CIS reinforcements will start to thin out. Capture the Derelect if it is captured but if it isn't just take a trooper and blast the heck out of the remaining droids.

Hope this helped

Life is simple. I shoot you and you shoot me.

I am Optimus Prime-Optimus Prime(Duh!)

*Jazz walks out of swimming pool* "Are you the tooth fairy?"-Little Girl(Transformers)